使用 extends 子句时发现不明确的映射 [英] Ambiguous mapping found when I use extends clause

问题描述

我有一个 CustomerController 和 CustomerCardController 类，它们扩展了 CrudMethods 类.

I have a CustomerController and CustomerCardController classes that extend CrudMethods class.

我选择这样，因为这两个控制器使用相同的方法(getFileCustomer() 就是其中之一).我认为最好使用继承来保存代码行.

I choose so, because these two controller use the same methods (getFileCustomer() is one of these). And I thought that it had been better use the inheritance to save code's rows.

客户控制器

@Controller
public class CustomerController extends CrudMethods {
...

CustomerCardController

@Controller
public class CustomerCardController extends CrudMethods{
...

CrudMethos

@Controller
public abstract class CrudMethods {

@RequestMapping("getFileCustomer")
@ResponseBody
public String getFileCustomer() {
...

当我运行时，GlassFish 给我这个错误:

When I run, GlassFish gives me that error:

HTTP 状态 500 - 内部服务器错误类型异常报告

HTTP Status 500 - Internal Server Error type Exception report

消息:内部服务器错误

描述:服务器遇到内部错误，阻止它来自于满足这个请求.

description: The server encountered an internal error that prevented it from fulfilling this request.

例外:

javax.servlet.ServletException: servlet 调度程序的 Servlet.init()抛出异常

javax.servlet.ServletException: Servlet.init() for servlet dispatcher threw exception

根本原因:发现不明确的映射

root cause: Ambiguous mapping found

问题是@RequestMapping 和@ResponseBody 注释.

The problems are @RequestMapping and @ResponseBody annotations.

事实上，如果我删除它们，应用程序就会启动.

In fact, if I remove them the application starts.

但我需要这些注释.因为，@RequestMapping 和@ResponseBody 在应用程序运行时被 Ajax 调用使用.

But I need of these annotation. Because, the @RequestMapping and @ResponseBody are used by Ajax call when the application runs.

两个控制器中都使用了 getFileCustomer().

And getFileCustomer() is used in both of controllers.

如何解决?

谢谢

推荐答案

@RequestMapping("getFileCustomer") 这个请求映射同时存在于 CustomerCardController 和 CustomerController 类，因为它们扩展了具有此映射的相同类.所以你有相同请求映射的重复条目.

@RequestMapping("getFileCustomer") this request mapping is present in both CustomerCardController and CustomerController class since they extend same class which has this mapping. So you have duplicate entry for same request mapping.

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